Electric bed-warming device



1. o. K INOSITA. ELECTRIC BED WARMINQDEVICE. APPLICATION FILED APR.8, I9I8. RENEWED OCT. 6| I9I9 1,326,133. Patented Deo. 23,1919.

Fgg 4 /8 @ya unirsi) sfrafrns afrnnfr orrion JAMESOTOICHI KINOSITA, OF LOS ANGELES, CALIFORNIA.

ELECTRIC BED-WARMING- DEVICE.

Specification of Letters Patent. Patented Dec. 23, 1919.

Application filed April 8, 1918, Serial No. 227,228'. Renewed October 6, (1919. Serial No. 328,945.

greatest amount of heat at a minimum cost, -of production, to provide a device of the character described which is inexpensive to produce, land of which the parts that may be subject to deterioration may be readily obtained atsmall cost for renewal.

The invention hereinafter described, while particularly adapted for ,warming a bed, may be used and employed for various analogous purposes and in various analogous ways. y

ln the drawings, Figure 1 is a front elevation ef a heating device embodying my invention; Fig. 2 is a rear end elevation of the sam-c; Fig. 3 is a vertical and longitudinal mid-section of the device; VFig. l is a transverse sectional view Showing the relative position of the switch and rheostat elements. Fig. 5 is a diagram of the wiring and electric elements.

eferring to the drawings, the device consists essentiallyT of a receptacle 11, preferably constructed of galvanized sheet metal, and having a wooden base 12,V and wooden reinforcing` elements 13, 1A, for stiffening the sheet metal walls. The rear end wall 15, may fbe of suitable insulating material as shown, and may be made of wood, the inner partition wall 16, is made preferably of fiber, and divides the interior into the heating compartment 17, and the switch compartment 18, and serves to protect the switch and rheostat elements from the heat. Within the heating compartment 17, is mounted the electric bulb receptacle 19, containing the electric bulb 20, adapted to serve as the heating element. The front end of the receptacle is provided with a swing door closure 21, supported by the pivotal bearing elements 22, 23. The bearing elements 22, 23, are relatively off-set relative to one another, so that, when the closure member 21 swung to closed position, it will be re-i tained in position through contact with the walls of the receptacle, which are formed with unequal sides and angles. In the open position of the closure member, the same is held in position .by contact with the walls of thereceptacle, particularly the inclined section 24, which is provided with reinforcingr element 14. The closure element is thus held in either position by frictional contact. In the open position of the closure element, the electric bulb may be utilized for lighting purposes, the polished sheet metal walls of theV receptacle serving as a reflector therefor. In compartment 18, are contained the resistance coils 25, 26, forming a rheostat for control ofthe current which is supplied to the electric bulb. From the rheostat 27, the current will pass to the switch 28, which is of simple construction as shown, and provided for four positions, namely: lirst, a high resistance, including coils 25, 26; second, a medium resistance, including the coil 25, only; third, a low resistance, allowing the flow of the full current; and fourth, off. The Switch 28, consists of a receptacle 29, of insulation, provided with an annular wall 30, on which are mounted spring contact elements 31, connected by wire conduits 82, with the rheostat 27. A revoluble shaft 33, connected to the operatingbutton 84 and provided with an indicator 35, passes through the inner wall 16,'and is in contact with the connecting element 86, of the electric bulb receptacle 19. A ratchet/member 37, mounted Von the shaft, has mounted thereon the contact element 38, connected to the shaft 88, and adapted to register successively with the contact elements 31, except in the o' position. An indicator plate 39, on the rear wall, denotes the operative positions of the switch. A tension spring 4:0, interposed between the rear wall, and the ratchet member 37, tends to retain the switch in its operative positions. In the diagram shown in Fig. 5, the positive wire conductor 41 is shown connected to the rheostat, and the negative wire conductor 42 is shown connected to the bulb receptacle 19, the conductors entering through an opening 43 in the rear wall, and conductor 4t2 passing through an opening 4-/1- in the inner wall. The device is covered with a heavy woven fabric 45, which serves to conserve the heat and particularly adapts the device for the purposes specified. v

In the preferred. forniof the invention7 the device is constructed with a layer 4:6, of

a poor heat conducting" material, preferably asbestos. 'fhe device may be further modified by constructing a wooden receptacle, or

Y casing, and omitting,` the` sheet metal therein.

' It .may be noted that the reinforcing member la extends within the limits of compartment 18,`only.

While simple and efiicient means are herein shown for accomplishing the objects of the invention, and the elements shown and described are well adapted to serve the purposes for which they are intended, it is to be understood that the invention is not limited tothe'precise construction exhibited in the drawings, but 'that changes, alterations, and

modifications, that may fall within the scope" of the appended claims, may be made if desired.

lhat is claimed is:

l. The combination with an angular and metallic receptacle having an open end, of

closure meansfor the open end retained in position byfrictional contact with the receptacle, al partition wall forming interior switch and heating compartments, an electric bulb in the heating compartment, a switch in the switch compartment, electric bulb contact terminals, a revoliible switch member 4in contact with one of said terminals and projecting through the switch coinpartment, an exteriorly disposed button to actuate the switch shaft, and electric coni ductors connected to the switch andthe remaining` electric bulb terminal, said4 bulb serving as a lighting medium when the receptacle closure is in open position, and as a heating medium when the closure is in closed position. v

2. A heating; device comprising an augular-walled receptacleof sheet metal, andV having an open end, a closure element for the openV end Aadjustableto the open and closed positions and retained in position by 'frictionalcontact with the angular walls of the receptacle, an inner transverse partition compartment and a switch compartment, an electric bulb receptacle in the heating compartment and attached to the inner partition wall, a switchre'cep'tacle inthe v'switch compartment, a series ofspringcontact elements vcarried by the 'sivitchieceptacle, a revoluble shaft coaxial with the switch receptacle, a button to actuate 'the rev'oluble shaft, a ratchet element fixed to thel revoluble shaft, a 'Contact' plate on the'ratchet element, said .contact plate being' connected with the axial shaft, a contact terminal of the bulb receptacle in constant contact with the axial shaft, a dialplate on the exterior of the augular-walled receptacle, an indicator fixed to the axial shaft and adapted to cooperate with the dial to set theswitch, electric supply current conductors, one being secured to the Vswitch andthe other to the'remaining bulb receptacle contact terminal, an incaudescent bulb mounted inthe bulb receptacle adapted to supply heat when energized through the switch control, and serving` as lighting' means when the receptacle closure is in open position, and a cloth 'fabric coverving for the 'angular-walled receptacle, said `wall dividing the interior into a heating 

